Computing-scale



w. F. STIMPSON.

COMPUTING SCALE.

APPLICATION FILED NOV. 25. 19M

1,367,213. Patented Feb. 1,1921.

2 SHEETS SHEET I.

; 4 0 260 MP0 m 0 1:90"

W. F. STIMPSON.

COMPUTING SCALE.

APPLICATION FILED NOV. 25. 1914.

Patented Feb. 1, 1921.

2 SHEETS-SHEET 2 l ll A TTOR/VEKS UNITED STATES PATENT OFFICE.

COMPUTING-SCALE.

Specification of Letters Patent.

Patented Feb. 1, 1921.

Application filed November 25, 1914. Serial No. 873,893.

the accompanying drawings.

The invention relates to computing scales, and resides in the provisionof a novel and simple construction of computing mechanism associatedwith the tare beam, which when the weight applied to the tare beam isvaried, will provide proper computation for such variation in the tarebeam weight; and further, in certain details of construction andarrangement and combination of parts as will more fully hereinafterappear.

In the drawings,-

Figure 1 is a rear elevation of a scale embodying the invention;

Fig. 2 is a vertical central section of the computing mechanism for thetare beam;

Fig. 3 is an elevation of a portion of such computing mechanism;

Figs. 4 and 5 are sections on lines wm and y of Fig. 2; and

Figs. 6, 7, 8 and 9 illustrate modifications.

A designates the base frame having a portion B extending upwardlytherefrom, and C is'the usual computing section for the index hand D. Eis the weighing beam fulcrumed at F upon the upward extension B, and Gis the steelyard rod connecting the weighing beam with the platformlevers.

With the constructions of scales now in general use a given unit isemployed for the computing chart and the tare beam, this unit usuallybeing tenpounds; The computing chart for the index hand will indicatethe cost of various prices per pound of an article of any weight up toand including a predetermined unit, but if the article weighs more thanone unit an additional weight is added to the weighing beam. In

such case, however, the chart computes for only that fraction of a unitof weight over and above the unit or units of a weight applied to thetare beam.

By my improvement I provide a construction of computing mechanism bywhich, upon the variation of the units of weight applied to the tarebeam, not only is there presented to view computations compiled inaccordance with the particular unit or units of weight applied to thetare beam, but also computations for fractions of a unit of weight.

The invention is capable of being embodied in various structures, andwhile I have shown in the drawings two novel and desirableconstructions, I do not desire to limit the protection to the particularstructures illustrated.

Referring to the arrangement shown in Fig. 1 to 5 inclusive. H is acomputing section composed a casing I within which is arranged forrotation a cylinder J. WVithin the casing and beneath the transparentpanel L is a row M of price numerals as 4:0, 38, 35, etc, for the priceper pound, while at the top of the cylinder are the numbers 10, 20, 30,etc, indicating the units of weight Beneath each of the indications forthe units of weight is a column N of indications giving the value ofsuch unit at the various prices per pound shown in column M. Uponrotation of the cylinder J the various columns N will be exposed to viewthrough the transparent panel, when brought into registration with thecolumn N. The transparent panel is of sufficient width to expose but onecolumn N at a time. The casing I is provided with an arm 0 which isattached to the section C, while the lower end of the casing I isconnected to a weight support P. The latter has an arm Q, that is boltedor otherwise suitably connected to the base frame A... It is a tubularextension of the casing I within which is arranged for longitudinalsliding movement a follower S. T is a shaft connected to the cylindcr J,extending through the member S and adapted to turn therein. The lowerend of the member T is journaled upon a pointed bearing U on the weightsupport, while the 1. point if on a cap W that closes the upper end ofthe casing The shaft T has a spiral groove X therein w ithin which isarranged a lug Y on the lower end of the member Sf The latter is heldagainst turn: ing within the extension R by means of a guide A thatengages a bifurcated ortion B at the lower end of the member The extraweights for the beam E are arranged intermediate the base C of theweight support and the lower end of the member S, as shown in Fig. 2,and the latter is free to lower whenever a weight is removed from thesupport C. Preferably the weight supupper end of the cylinder J engagesa pivot port is provided with a guide rack D having resilient fingers Eadapted to retaln the weights in place. In order to facilitate thereplacing of the weights upon the rack the latter are provided with abeveled portion F at the forward edge thereof, and the lower end of themember S is provided with a foot G that has its outer edge beveled asindicated at H, the foot G being of a width to engage the beveledportion F. The parts are so proportioned that the removlng of a weightfrom the rack P or the replacing of a weight upon the rack will effect arotation of the cylinder J equal to the distance between two columns.When all the weights are upon the rack G the Zero column J on thecylinder J is in registration with the sight opening. Upward or downwardmovement of the member G will-because of the pin Y in the spiral slotX-eifect a rotation of the cylinder J.

In operation of the construction so far described, assuming the unit ofweight is ten pounds and an article of fifteen pounds weight is placedupon the scale, since when all the weights are upon the rack P the scaleonly weighs to ten pounds, it will be necessary to remove one of theextra weights from the rack P and place it upon the counterpoise rack I.The removal of a weight from the rack P will cause the cylinder J to beturned to position the ten pound column beneath the transparent panel,and when the weight is upon the rack I the computing section H willindicate to the operator the price for ten pounds, while the computingsection C for the index hand will indicate to the operator the price forfive pounds, To obtain the total price it is merely necessary to add theproper computation on the computing section H to that of the computingsection C. If two or more weights are removed from the rack P thecylinder J will be correspondingly shifted, and whenever the weight isremoved from the rack I and replaced upon the rack P the cylinder J willbe returned to its proper position. The operation of the computingsection H is, therefore, automatically con trolled by the variation inthe weight applied to the beam E.

In the construction shown in Figs. 6 to 9 inclusive, the indicatingsection comprises a casing L within which is arranged for r0- tation acylinder M, the casing L having a sight opening N and the casing L andcylinder M being provided with indications of the same general nature asdescribed in connection with Figs. 1 to 5 inclusive, with the exceptionthat the indications run longitudinally of the roll instead ofvertically. The roll is operated by means of a lever 0 having at itsupper end a rack P that en gages a pinion Q attached to the cylinder M.The lower end of the member 0 is pivotally connected at Q to a lever R.The latter is pivoted at one end at S to the casing, while the oppositeend of the lever has an adjustable connection with an index rack T uponthe casing. Pivotally connected to the weighing beam U is acounter-poise rack V that extends downwardly within the casing. Thisrack is provided with a plurality of spaced collars, two being shown inthe drawings, WV W for engaging counter-poise weights X X These weightsare normally supported upon the lever R. When the latter is at theposition shown in full lines in Fig. 6, the collars IV do not enga e theweights X and therefore the beam is not subjected to the counter-poiseweights. end of the lever R is moved to the position marked 10 on theindex rack, the weight X will rest upon the collar W and the weighingbeam U will therefore be subjected to this counter-poise weight. Theweight X however, is still supported by the lever R. When the outer endof the latter is shifted to the position marked 20, both the weights Xand X will be carried by the member V. Upon the raising or lowering ofthe lever B the member 0 will be correspondingly raised or lowered,which throu h the medium of the rack P and gear will effect a propershifting of the cylinder M to present to view the desired computations.

Any suitable manner of retaining the outer end of the lever R in itsadjusted position may be employed. The structure shown in the drawingscomprises a springpressed dog Y that is adapted to engage recessedportions Z in the member T.

In the modification just described, as with the structure shown in Figs.1 to 6 inclusive, whenever the weight applied to the weighing beam isvaried, the computin section for such beam is automatically a justed topresent to view proper computations.

It is desirable to have the amount of the weight or weights applied tothe weighing beam indicated to the customer. In the construction shownin Figs. 1 to 6 inclusive, a row of computations A is placed around theupper end of the cylinder J and are adapted to be brought successivelyinto registration with the sight opening a on the front side of thecasing I. In the construction shown in Figs. 7 to 10 inclusive thecylinder M is provided adjacent one end thereof with a row ofcomputations e that are adapted to register with a sight openin b at thefront of the casing L. Preferably the rear side of the casing L isprovided with a second sight opening a with which another row ofcomputations d is adapted to register.

IVhen the outer What I claim as my invention is 1. In weighingmechanism, a weighing beam, a computing device therefor, comprising acasing, a cylinder journaled to turn in said casing, a weight support, afollowercarried by the weight support, and a connection between saidfollower and said cylinder for effecting a rotation of the latter upon alongitudinal movement of the follower, and computations upon saidcylinder, and a sight opening in said cylinder with which saidcomputations are adapted to register.

2. In weighing mechanism, a weighing beam, a computing device thereforcomprising a casing, a cylinder journaled to turn in the casing, a shaftconnected to the cylinder to turn therewith, a longitudinally movablefollower, a connection between said follower and said shaft for turningthe latter upon the longitudinal movement of the follower, a weightsupport, weights upon said support on which the follower is adapted torest, computations upon said cylinder, and a sight opening in saidcylinder with which said computations are adapted to register.

3. In weighing mechanism, a weighing beam, a computing device for saidbeam, comprising a casing having an extension, a cylinder journaled insaid casing, a shaft connected to one end of said cylinder andprojecting into said extension, a follower arranged in said extensionfor longitudinal movement, a pin and spiral slot engagement between thefollower and the shaft, a weight rack connected to said extension,weights upon said rack upon which said follower is adapted to rest,computations upon said cylinder, and a sight opening in said cylinderwith which said computations are adapted to register.

4. In weighing mechanism, a weighing beam, means for varying the weightapplied to the beam, a computing device for the weighing beam comprisinga casing having sight openings viewable from opposite sides thereof, anadjustable member within the cylinder having computations adapted toregister with one of said sight openings and having weight indicationsadapted to register with the other sight opening, and means foradjusting said member upon a variation of the weight transferred toactive use for the beam.

5. In a computing device for weighing scales, the combination with twocoacting relatively movable members, one of which carries figures andthe other computations involving said figures, of a member for actuatingrelative motion of the first named members, acted upon by a forcetending to move it in a certain direction and a plurality of weights,normally in the path of said actuating member and separately removablefrom their normal positions to allow successive displacements of saidmember.

6. In a computing device for weighing scales, the combination with twocoacting relatively movable members, one carrying figures and the othercomputations, involving said figures, of a rectilinearly movable memberfor actuating relative motion of the first-named members, acted upon bya force tending to move it in a certain direction, a support, and aplurality of weights upon said support, opposing motion of the actuatingmember and separately transferable to another part of the mechanism fromsaid support to allow successive displacements of said member.

7. In a computing device for weighing scales, the combination with twocoacting relatively movable members, one of which carries figures andthe other computations involving said figures, of a member actuatingrelative motion of the first-named members, acted upon by a forcetending to move it in a certain direction, a support, a plurality ofweights upon said support opposing motion of the actuating member andseparately removable from said support to allow successive displacementsof said member, resilient members carried by the support for separatelyengaging each weight and a handle member projecting from the actuatingmember.

In testimony whereof I affix my signature in presence of two witnesses.

WALTER F. STIMPSON.

Witnesses WM. J. BELKNAP, .TAMns P. BARRY.

